Malware Analysis Report

2025-08-05 14:06

Sample ID 230808-jkknfacg9x
Target kobee951587.exe
SHA256 2e97f4d6bf16c0c918f48301129830bf11639ac0090c6eb937b126345fcc2185
Tags
guloader downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2e97f4d6bf16c0c918f48301129830bf11639ac0090c6eb937b126345fcc2185

Threat Level: Known bad

The file kobee951587.exe was found to be: Known bad.

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Checks QEMU agent file

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Enumerates physical storage devices

Program crash

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-08 07:43

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-08 07:43

Reported

2023-08-08 07:46

Platform

win7-20230712-en

Max time kernel

120s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\kobee951587.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Checks QEMU agent file

Description Indicator Process Target
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\kobee951587.exe

"C:\Users\Admin\AppData\Local\Temp\kobee951587.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsj74C4.tmp\System.dll

MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

C:\Users\Admin\AppData\Local\Temp\nsj74C4.tmp\System.dll

MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

\Users\Admin\AppData\Local\Temp\nsj74C4.tmp\System.dll

MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

memory/1952-68-0x0000000002FF0000-0x0000000005616000-memory.dmp

memory/1952-69-0x0000000077140000-0x00000000772E9000-memory.dmp

memory/1952-71-0x0000000002FF0000-0x0000000005616000-memory.dmp

memory/1952-70-0x0000000077330000-0x0000000077406000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-08 07:43

Reported

2023-08-08 07:46

Platform

win10v2004-20230703-en

Max time kernel

141s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\kobee951587.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Checks QEMU agent file

Description Indicator Process Target
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kobee951587.exe N/A

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\kobee951587.exe

Processes

C:\Users\Admin\AppData\Local\Temp\kobee951587.exe

"C:\Users\Admin\AppData\Local\Temp\kobee951587.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3760 -ip 3760

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3760 -s 1100

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 45.8.109.52.in-addr.arpa udp
US 8.8.8.8:53 4.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsh7FFE.tmp\System.dll

MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

C:\Users\Admin\AppData\Local\Temp\nsh7FFE.tmp\System.dll

MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

C:\Users\Admin\AppData\Local\Temp\nsh7FFE.tmp\System.dll

MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

memory/3760-145-0x0000000003260000-0x0000000005886000-memory.dmp

memory/3760-146-0x0000000003260000-0x0000000005886000-memory.dmp

memory/3760-147-0x0000000077CE1000-0x0000000077E01000-memory.dmp

memory/3760-148-0x0000000003260000-0x0000000005886000-memory.dmp